It's funny - I had the same reaction at the first parts, but I thought the Slack bot pivot was genius actually. Very different than expensify and the "others".
Genius? So your new business model is to exclude a huge number of people (despite what you may see here on HN, most people writing expense reports don't use slack), and tie your business to a third party closed platform.
Ok...
Very different, and I imagine probably even more frustrating than a high-friction data entry form. It would take a lot of convincing for me to think submitting an expense report via bot would be better than, say, putting receipts as attachment in an email and sending to a person.